Commit 7e308e00 authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg/aarch64: Use MVNI in tcg_out_dupi_vec 



The compliment of a subset of immediates can be computed
with a single instruction.

Signed-off-by: default avatarRichard Henderson <richard.henderson@linaro.org>
parent 984fdcee

tcg/aarch64/tcg-target.inc.c

+11 −0
Original line number Diff line number Diff line
@@ -494,6 +494,7 @@ typedef enum { 


    /* AdvSIMD modified immediate */

    I3606_MOVI      = 0x0f000400,

    I3606_MVNI      = 0x2f000400,



    /* AdvSIMD shift by immediate */

    I3614_SSHR      = 0x0f000400,
@@ -838,8 +839,13 @@ static void tcg_out_dupi_vec(TCGContext *s, TCGType type, 
            tcg_out_insn(s, 3606, MOVI, q, rd, 0, cmode, imm8);

            return;

        }

        if (is_shimm16(~v16, &cmode, &imm8)) {

            tcg_out_insn(s, 3606, MVNI, q, rd, 0, cmode, imm8);

            return;

        }

    } else if (v64 == dup_const(MO_32, v64)) {

        uint32_t v32 = v64;

        uint32_t n32 = ~v32;



        if (is_shimm32(v32, &cmode, &imm8) ||

            is_soimm32(v32, &cmode, &imm8) ||
@@ -847,6 +853,11 @@ static void tcg_out_dupi_vec(TCGContext *s, TCGType type, 
            tcg_out_insn(s, 3606, MOVI, q, rd, 0, cmode, imm8);

            return;

        }

        if (is_shimm32(n32, &cmode, &imm8) ||

            is_soimm32(n32, &cmode, &imm8)) {

            tcg_out_insn(s, 3606, MVNI, q, rd, 0, cmode, imm8);

            return;

        }

    } else if (is_fimm64(v64, &cmode, &imm8)) {

        tcg_out_insn(s, 3606, MOVI, q, rd, 1, cmode, imm8);

        return;